Brain computer interface 23 Electroencephalography 18 human 18 Article 15 electroencephalography 14 Brain 13 Biomedical signal processing 11 brain computer interface 10 brain-computer interface 10 electroencephalogram 10 Brain-Computer Interfaces 9 adult 9 Electrophysiology 8 EEG 7 Electroencephalogram signals 7 Humans 7 female 7 male 7 Brain-computer interface 6 BCI 5 Brain–computer interface 5 Deep learning 5 controlled study 5 human experiment 5 machine learning 5 normal human 5 Animals 4 Electroencephalogram 4 Emotion recognition 4 Feature extraction 4